ATE545208T1 - INTERRUPTION ESTIMATION IN CODE MULTIPLEX MULTIPLE ACCESS SYSTEMS USING ALTERNATIVE SCRAPPING CODES - Google Patents

INTERRUPTION ESTIMATION IN CODE MULTIPLEX MULTIPLE ACCESS SYSTEMS USING ALTERNATIVE SCRAPPING CODES

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Publication number
ATE545208T1
ATE545208T1 AT04797499T AT04797499T ATE545208T1 AT E545208 T1 ATE545208 T1 AT E545208T1 AT 04797499 T AT04797499 T AT 04797499T AT 04797499 T AT04797499 T AT 04797499T AT E545208 T1 ATE545208 T1 AT E545208T1
Authority
AT
Austria
Prior art keywords
estimation
dpch
alternative
code
codes
Prior art date
Application number
AT04797499T
Other languages
German (de)
Inventor
Johan Nilsson
Torgny Palenius
Bengt Lindoff
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of ATE545208T1 publication Critical patent/ATE545208T1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70707—Efficiency-related aspects
    • H04B2201/70709—Efficiency-related aspects with discontinuous detection

Abstract

Methods and apparatus that improve interference (I) estimation in CDMA systems in which the DPCH is sorted under a scrambling code different from the scrambling code of a channel such as the CPICH are described. In such systems, DPCH I-estimation cannot be done by measuring on the CPICH and transforming to the DPCH due to the different interference situations on the two channels. Instead, the DPCH interference is estimated by using knowledge of empty channelization codes in the alternative or secondary scrambling code that can be used for I estimation, or using symbols (e.g., control symbols on the DPCCH) on the DPCH, or searching for an empty channelization code and using a found empty code for I-estimation. These techniques improve the SIR estimate in comparison to prior techniques and hence also improve the performance of power control, increasing the system's capacity.
AT04797499T 2003-11-04 2004-11-01 INTERRUPTION ESTIMATION IN CODE MULTIPLEX MULTIPLE ACCESS SYSTEMS USING ALTERNATIVE SCRAPPING CODES ATE545208T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/700,855 US7822155B2 (en) 2003-11-04 2003-11-04 Interference estimation in CDMA systems using alternative scrambling codes
PCT/EP2004/012251 WO2005046073A1 (en) 2003-11-04 2004-11-01 Interference estimation in cdma systems using alternative scrambling codes

Publications (1)

Publication Number Publication Date
ATE545208T1 true ATE545208T1 (en) 2012-02-15

Family

ID=34551304

Family Applications (1)

Application Number Title Priority Date Filing Date
AT04797499T ATE545208T1 (en) 2003-11-04 2004-11-01 INTERRUPTION ESTIMATION IN CODE MULTIPLEX MULTIPLE ACCESS SYSTEMS USING ALTERNATIVE SCRAPPING CODES

Country Status (5)

Country Link
US (1) US7822155B2 (en)
EP (1) EP1680868B1 (en)
JP (1) JP4557982B2 (en)
AT (1) ATE545208T1 (en)
WO (1) WO2005046073A1 (en)

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KR101395435B1 (en) * 2006-04-12 2014-05-14 텔레호낙티에볼라게트 엘엠 에릭슨(피유비엘) Controlling a power level in a wireless communications system with different scrambling codes
US7706329B2 (en) * 2006-10-24 2010-04-27 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for compressed mode handling in a dual receiver user equipment (UE)
US7929591B2 (en) * 2006-10-25 2011-04-19 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for multiple scrambling code impairment compensation
US8094554B2 (en) * 2006-10-26 2012-01-10 Qualcomm Incorporated Compressed mode operation and power control with discontinuous transmission and/or reception
US8781043B2 (en) * 2006-11-15 2014-07-15 Qualcomm Incorporated Successive equalization and cancellation and successive mini multi-user detection for wireless communication
US8009777B2 (en) * 2007-06-15 2011-08-30 Icera, Inc. Processing data in a digital communications system
US8259599B2 (en) * 2008-02-13 2012-09-04 Qualcomm Incorporated Systems and methods for distributed beamforming based on carrier-to-caused interference
CN102668611A (en) * 2009-11-27 2012-09-12 高通股份有限公司 Interference cancellation for non-orthogonal channel sets
US9319111B2 (en) * 2011-01-17 2016-04-19 Optis Wireless Technology, Llc Code allocation for uplink MIMO
US8792407B2 (en) 2012-02-21 2014-07-29 Qualcomm Incorporated Wireless communication device power reduction method and apparatus
WO2013127056A1 (en) * 2012-02-27 2013-09-06 Qualcomm Incorporated Estimation of interference power for secondary scrambling code
US9078266B2 (en) * 2012-10-11 2015-07-07 Qualcomm Incorporated Devices and methods for facilitating discontinuous transmission on access terminals
US9161308B2 (en) 2013-08-26 2015-10-13 Qualcomm Incorporated Devices and methods for facilitating autonomous discontinuous transmission in access terminals

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Also Published As

Publication number Publication date
EP1680868B1 (en) 2012-02-08
EP1680868A1 (en) 2006-07-19
US20050094816A1 (en) 2005-05-05
WO2005046073A1 (en) 2005-05-19
JP2007510341A (en) 2007-04-19
JP4557982B2 (en) 2010-10-06
US7822155B2 (en) 2010-10-26

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